Drop tests on Laravel 5.3 and 5.4

Author: JaZo

.scrutinizer.yml

@@ -20,7 +20,7 @@ checks:
 tools:
     external_code_coverage:
         timeout: 600
-        runs: 7
+        runs: 5
 
 build:
     nodes:

.travis.yml

@@ -2,10 +2,6 @@ language: php
 
 matrix:
   include:
-  - php: "7.0"
-    env: LARAVEL_VERSION="5.3.*"
-  - php: "7.0"
-    env: LARAVEL_VERSION="5.4.*"
   - php: "7.0"
     env: LARAVEL_VERSION="5.5.*"
   - php: "7.1"